I have a DSi with 1.45 system version but I couldn't find any way to downgrade the firmware except hardmodding it (and I don't really wish to mess with hardmodding since I had tried to hardmod my 3DS and failed before). Since there are some great exploits available for Nintendo's latest portable device 3DS that can be installed from SD card I thought there would also be a way for old DSi but so far I couldn't find any. I got my DSi from a friend with an old R4 card that only supports older versions so if I could downgrade my 1.45 system somehow I would be able to use it on my DSi. I know I can also order a brand new flash card but I don't really want to pay for that right now since I got this DSi without paying...